Cod sursa(job #1963194)

Utilizator YouDontNeedMyNameJurcut Paul YouDontNeedMyName Data 12 aprilie 2017 12:56:37
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 2.02 kb
#include<iostream>
#include <fstream>
using namespace std;
ifstream in("cautbin.in");
ofstream out("cautbin.out");
long long v[100005];
int main()
{
    int n,m,x,y,i,k,st,mij,j,dr;
    in >> n;
    for(i=1; i<=n; i++)
    {
        in >> v[i];
    }
    in >> m;
    for(i=1; i<=m; i++)
    {
        in >> x >> y;
        st=1;
        dr=n;
        mij=(st+dr)/2;
        if(x==0)
        {
            while(st<=dr && y!=v[mij])
            {
                if(v[mij]>y)
                {
                    dr=mij-1;
                }
                else
                {
                    st=mij+1;
                }
                mij=(st+dr)/2;
            }
            j=mij;
            while(v[j]==v[mij])
            {
                j++;
            }
            mij=j-1;
            if(v[mij]!=y)
            {
                mij=-1;
            }
        }
        else if(x==1)
        {
            while(st<=dr && v[mij]!=y)
            {
                if(v[mij]>y)
                {
                    dr=mij-1;
                }
                else
                {
                    st=mij+1;
                }
                mij=(st+dr)/2;
            }
            if(v[mij]==y)
            {
                j=mij;
                while(v[j]==v[mij])
                {
                    j++;
                }
                mij=j-1;
            }
        }
        else if(x==2)
        {
            while(st<=dr && v[mij]!=y)
            {
                if(v[mij>y])
                {
                    dr=mij-1;
                }
                else
                {
                    st=mij+1;
                }
                mij=(st+dr)/2;
            }
            if (v[mij]==y)
            {
                j=mij;
                while (v[j]==v[mij])
                    j--;
                mij=j+1;
            }
            else
                mij++;
        }
        out << mij << '\n';
    }
}